Givereasons for the following. a. Pascal is a derived unit.
b. Mass is a fundamental quantity.
c. Unit of power is a derived unit.
d. Unit of length is a fundamental unit.​

a)Ans. Pascal is a derived unit because it is depend upon fundamental unit like as Kg, Meter, and Sec.

b) Ans. Mass is a fundamental quantity because it unit is Kg and it's independent with other.

c) Ans. Unit of power is derived unit because it is depend upon fundamental unit like Kg, Meter, and Sec.

d) Ans. Unit of length is fundamental unit because it is independent with other.

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.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue